Anthony Edwards Dr. Mark Greene Actor George Clooney Dr. Doug Ross Actor Sherry Stringfield Dr. Susan Lewis Actor Noah Wyle Dr. John Carter Actor Eriq La Salle Dr. Peter Benton Actor Julianna Margulies Head Nurse Carol Hathaway Actor Christine Harnos Actor William H. Macy Actor Holly Gagnier Tracy Young Guest Star Glenn Plummer Timmy Rawlins Guest Star Vanessa Marquez Nurse Wendy Goldman Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Deezer D Nurse Malik McGrath Guest Star Abraham Benrubi Jerry Markovic Guest Star Paul Benjamin Al Ervin Guest Star Elizabeth Ruscio Sarah Logan Guest Star Michael Fairman Mort Harris Guest Star Michael Crichton Executive Producer John Wells Executive Producer Rod Holcomb Director Dennis Stuart Murphy Producer